With that mileage and in that condition it looks superb value if it sells for the estimate. Be interesting to see what it goes for, especially when the Steiner 450 didn't sell at the recent Brightwells auction.
Vin number suggests it is a 1991 car. Interesting to note that it does not have an NCK engine number. My 1990 400se has an engine number of NCK20HW (presumably the 20th hot wire nck engine).
Given that the plenum says 3.9 I would guess its had another motor probably a Rangie.... My 400 SE also had a NCK number but no engine size on the plenum.
Either way it looks a tidy car, as already mentioned it will be interesting to see if it makes the estimates
most hotwire 400SE's and all Griff / Chim 4.0's was standard range rover engines with a fast road camshaft fitted. This will give you 230 BHP with a good exhaust. and your find this is what most of them have.